Pump piston



' Dec. 21 1926.

, L. E. BAKER I PUMP PISTON "Filed July :3. 1923 2 Sheets-Sheet 1 l-- yI; 1 1 r] 41 111111) 1 4 INVENTOR.

Dec. 21 1926. 'l 1 1,611,262

L. E. BAKER PUMP PISTON Filed July 5, 1925 2 Sheets-Shasta INVENTOR.

A TTORNE Y.

lPatented Dfifi 2 BAKER,

"roar WAYNE, INDIANAQA ooaeoaarronoa innrana I IIEUM- B -PISTONLinvention relates pistons for recip;

. rocatingfpumps;

as to prevent its'being crowded against the wallsof thecylinde'r in'sucha manner as to cause excessive friction. The top "and bot-'- tom; platesand thespring are preferably made of sheet metal, and the spacerbetween;

the two oftubing, and when thet'op and bottom plates are so punched anddrawn a cheap: and sturdy frame-work is formed, with en--- 7 closingspace'for the valve'andvalve weight.

My invention is illustrated 'inthe accompanymg drawings, in which,

'"Figurel' shows the piston and the attendant part of the piston rod;substantially one;-

quarter of the piston being cutand broken away to show the same inaxialsection, and

Fig. 2 is a top planet the same with ,pa rt equal approximately to asegment oil/ g likesegment of the weight and spring and superimposedparts broken away to show the valve leather and piston leather, and

another likesegment of the valve leather,

piston leather and' 'sup'erimposed parts bro-f ken away to Show, thebottom plate;

'Referring jnow 'to the drawlngs, a disc bottom plate AprefeTablypunched from sheetmetal has its peripheral edge bent u wardlyto better I support a cup leather This bottom plate hasa plurality ofbolt holesa, aplurality of ports a}, and an axial hole a 'for the pistonrod D. 2

, Above'this bottom plate coaxialwith it isa tubular spacer C adapted tomake a slip fit over the piston rod D. disc valve lea her E 's piercedaxially to seat over the spacer C .upon the top of the bottom plate A,normally ,closingthe ports afiand-avalve weight F which fitsloosely 7over the spacer G rests upon the valve leathertending to hold it to itsseat. p 1

An upwardly cupped: disc vpiston leather M r G rests upon the outerpartofthetopofthe 5 lower plate A, has a plurality of bolt holes adaptedto register with thebolt holes 1' :A disc spring S upwardly; cupped and:

havingat its periphery fingers 8 adapted to:

Application 7 filed; July 3,

tion forms a pistonlight inweight, stron center;

v I Obviously many of thetop plate broken away to show a ortion of theweight and the spring, anot ier' cry of the piston;

{piston operates. ,7 V 1 v I i V V I, 4 -Apiston adapted "to, besecuredtofaf l-piston} rod, having in combination, a bottbm plate, a topplate havingan upwardlyfbulg or FORT WAYNE, INDIANA; assisting pro WAYNEGOMPAN oF sate isiiiatff i seere spoil all; inside surfacefi'thefcuppedportion o'fthepiston leather 9 tending-to 11 1a it swan-rtimes in- A; Circul dfpiston t p Pli l: lr f {n t saws a I p cc; "Pu efr n hetmetal, i form d with it centralportion lextendingupwardly, ii-[the I "formrof truncated (39116,111tl hasa plurality of bolt holeshregisteringwith holes 9 and a, a,

a plurality of liquidjpassagesfh and an axial hole 7L2 forthej pistonjrod Di ,flhe-top plate H has its'peripheraliedgecupped upwardly 1 insuch;- a= manner-asitoleave a spacefbe tween it and the springfi'ngerscs when'the topplateis pressed down into position for being assembledupon the spring S towards The] nut d below holds the pistonmemberssepistonirod D with nut d above and itsTperiphery anduponthespacer C at the curelv together at the center, and vbolts'fB.

each withfa nut Z)v holdthe piston membersj securely togethertowardstheperiphery. 72

are vent holes; I

changes be made-ii i the device without dep of my invention,

arting from'the spirit 1 Ifclaini as zmy invention and, desire to Statesthem, 'a flexible 'disc valve in said chamber,

an independent-weight tending tokeep said F f i I -valve closed, and apiston leather between plates at the periph said top and bottom I 3;Aflpiston having a topand. a bottom .plate' shaped tofOrm a chamberbetween them. a single" flexible; disc valve in said secure} by Letters-Patent oi the United 7 chamber, an independent'weight tending to keepsaid valveclosed, apiston leatherlbetween said vtop and bottom plates atthe eripheryofthe piston, and spring tending to hold said-pistonleatlierin "conta'ct f with the'wall of the cylinderi'in which: said v or ingcentral portion tor form a chamber be tween said top and. bottoin'plates, means forholding said top and bottom plates in spaced relationto each other, liquid passages in said top plate and ports in saidbottom plate, a valve leather, adapted to close saids ports, a valveweight adapted to 1 seat upon said valve leather, a cupped piston.leatherseated upon the lower plate at its periphery, a plate springadapted to seat between said piston leather and the top plate and totend topress the cupped p012 tionof the piston leather"outwardly, and

pistonrod, havingin combination, a bottom'" plate cuppedupwardly at itsperiphery and of such diameter. as 'to escape Contact j with the,cylinder w'all,'a top plate cupped upwardly at itsperiphery and havingan upwardly bulging central portion to form my hand.

a chamber between said top and bottom v plates, anaxially placed sleevefor the piston rod, adapted ,to hold said top and bottom plates inspacedvrelation toeach other, liquid passages inthe top plate, portsinsaid'bot torn plate, a valve leather guided by said sleeve adaptedto'close said ports, a weight guided by said sleeve'adapted to seat uponsaid valve leather, an'upwardly cupped pis ton leather seateduponthe-lower plate at its periphery, a fingered plate-spring adapted toseat upon saidpiston leather and to tend o-to press the cupped portionof the 7' piston leather outwardly, the top plate adapted t0 allowmovement of the spring fingers, and plurality of bolts toward theperiphery otsaid: plates holding the top and bottom plates, pistonleather and spring se-V surely together." Y 7 p In testimony whereofIhave hereunto set 'LIN AEUS E. BAKER.

